Loans and Allowance for Loan Losses (Details 2) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 638,696	$ 548,492
Total	651,046	566,347	$ 547,040
Nonaccrual	8,493	9,364
30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	4,922	7,622
60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,072	2,770
Greater Than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	6,356	7,463
Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	78,710	66,542
Total	79,055	67,650	60,706
Nonaccrual	630	1,237
Commercial and industrial | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	16	69
Commercial and industrial | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	6	19
Commercial and industrial | Greater Than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	323	1,020
Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	224,699	211,193	204,793
Commercial real estate | Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	10,407	4,494
Total	10,407	5,621
Nonaccrual	0	1,127
Commercial real estate | Construction | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Commercial real estate | Construction | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Commercial real estate | Construction | Greater Than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	1,127
Commercial real estate | Non-residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	197,367	184,877
Total	201,913	192,469
Nonaccrual	4,214	4,442
Commercial real estate | Non-residential | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	2,229
Commercial real estate | Non-residential | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	332	921
Commercial real estate | Non-residential | Greater Than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	4,214	4,442
Commercial real estate | Multifamily
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	11,745	12,637
Total	12,379	13,103
Nonaccrual	453	0
Commercial real estate | Multifamily | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	181	0
Commercial real estate | Multifamily | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	466
Commercial real estate | Multifamily | Greater Than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	453	0
Residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	42,823	41,989
Total	44,388	43,300	41,417
Nonaccrual	2,366	2,100
Residential | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	849	450
Residential | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	56	422
Residential | Greater Than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	660	439
Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	302,905	244,204	$ 240,124
Consumer | Indirect automobile
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	268,108	209,574
Total	272,892	214,823
Nonaccrual	542	442
Consumer | Indirect automobile | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	3,627	4,022
Consumer | Indirect automobile | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	640	808
Consumer | Indirect automobile | Greater Than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	517	419
Consumer | Home equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	19,255	18,637
Total	19,559	19,452
Nonaccrual	265	12
Consumer | Home equity | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	137	676
Consumer | Home equity | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	127
Consumer | Home equity | Greater Than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	167	12
Consumer | Other consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	10,281	9,742
Total	10,453	9,929
Nonaccrual	23	4
Consumer | Other consumer | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	112	176
Consumer | Other consumer | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	38	7
Consumer | Other consumer | Greater Than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	$ 22	$ 4